AXATOMY OF THE SPIXAL COKD. 



269 



up to this time afford at least the outlines of a sketch which, 

 as regards the course of the fasciculi of the anterior roots, 

 has a tolerably definite basis ; and, on the other hand, with 



FIG. 10. 



Transverse section of the spinal cord of a child six months old, at the middle of the lumbar en- 

 largement treated with potassio-chloride of gold and nitrate of uranium i>y means of these 

 .ts. the direction of the fibres in the gray substance is rendered unusually distinct. 

 Magnified 20 diameters. a, anterior columns; 6. posterior columns: c. lateral columns; 

 d, anterior roots ; e, posterior roots ; f, anterior white commissure, in communication with 

 the fasciculi of the anterior cornua and the anterior columns ; g, central canal with its epithe- 

 lium; //, surrounding connective substance of the central canal; i. transverse fasciculi of the 

 gray commissure in front of the central canal; l\ transverse fasciculi of the gray commissure 

 behind the central canal ; , transverse section of the two central veins ; m. anterior cornua ; 

 11. great lateral cellular layer of the anterior cornna ; o. lesser anterior cellular layer; p. small- 

 est, median cellular layer"; g. posterior cornua ; r, ascending fasciculi in the posterior cornua ; 

 *. substantia gelatinosa (GERLACIL in STEICKEB, Ilandbudi der Lehre von, den Geweben, 

 Leipzig, 1868, S. 666). 



regard to the fasciculi going to the spinal cord through the 

 posterior roots, is quite incomplete and uncertain. 



" The fasciculi of the anterior roots, after their entrance 

 into the cord, pass diagonally through the white substance, 



